<template>
    <view :class="[styleType === 'text' ? 'segmented-control--text' : 'segmented-control--button']"
        :style="{ borderColor: styleType === 'text' ? '' : activeColor }" class="segmented-control">
        <view v-for="(item, index) in values" :class="[styleType === 'text' ? '' : 'segmented-control__item--button',
        index === currentIndex && styleType === 'button' ? 'segmented-control__item--button--active' : '',
        index === 0 && styleType === 'button' ? 'segmented-control__item--button--first' : '',
        index === values.length - 1 && styleType === 'button' ? 'segmented-control__item--button--last' : '']"
            :key="index"
            :style="{ backgroundColor: index === currentIndex && styleType === 'button' ? activeColor : '', borderColor: index === currentIndex && styleType === 'text' || styleType === 'button' ? activeColor : 'transparent' }"
            class="segmented-control__item" @click="_onClick(index)">
            <view>
                <text :style="{
                    color:
                        index === currentIndex
                            ? styleType === 'text'
                                ? activeColor
                                : '#fff'
                            : styleType === 'text'
                                ? '#8f8f8f'
                                : activeColor
                }" class="segmented-control__text"
                    :class="styleType === 'text' && index === currentIndex ? 'segmented-control__item--text' : ''">{{
                        item }}</text>
            </view>

        </view>
    </view>
</template>

<script>
/**
 * SegmentedControl 分段器
 * @description 用作不同视图的显示
 * @tutorial https://ext.dcloud.net.cn/plugin?id=54
 * @property {Number} current 当前选中的tab索引值，从0计数
 * @property {String} styleType = [button|text] 分段器样式类型
 * 	@value button 按钮类型
 * 	@value text 文字类型
 * @property {String} activeColor 选中的标签背景色与边框颜色
 * @property {Array} values 选项数组
 * @event {Function} clickItem 组件触发点击事件时触发，e={currentIndex}
 */

export default {
    name: 'UniSegmentedControl',
    emits: ['clickItem'],
    props: {
        current: {
            type: Number,
            default: 0
        },
        values: {
            type: Array,
            default() {
                return []
            }
        },
        activeColor: {
            type: String,
            default: '#2979FF'
        },
        styleType: {
            type: String,
            default: 'button'
        }
    },
    data() {
        return {
            currentIndex: 0
        }
    },
    watch: {
        current(val) {
            if (val !== this.currentIndex) {
                this.currentIndex = val
            }
        }
    },
    created() {
        this.currentIndex = this.current
    },
    methods: {
        _onClick(index) {
            if (this.currentIndex !== index) {
                this.currentIndex = index
                this.$emit('clickItem', {
                    currentIndex: index
                })
            }
        }
    }
}
</script>

<style lang="scss" scoped>
.segmented-control {
    /* #ifndef APP-NVUE */
    display: flex;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    height: 88rpx;
    overflow: hidden;
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
}

.segmented-control__item {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    box-sizing: border-box;
    /* #endif */
    position: relative;
    flex: 1;
    justify-content: center;
    align-items: center;
}

.segmented-control__item--button {
    border-style: solid;
    border-top-width: 1px;
    border-bottom-width: 1px;
    border-right-width: 1px;
    border-left-width: 0;
}

.segmented-control__item--button--first {
    border-left-width: 1px;
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.segmented-control__item--button--last {
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
}

.segmented-control__item--text {
    border-bottom-style: solid;
    border-bottom-width: 2px;
    padding: 6px 0;
}

.segmented-control__text {
    font-size: 14px;
    line-height: 20px;
    text-align: center;
}
</style>
